Railroad Archives Online
| Places term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Skyland (Mont.) | 13 | 0 | |
| Skykomish (Wash.) | 555 | 0 | |
| Skones (Mont.) | 3 | 0 | |
| Skipanon (Or.) | 4 | 0 | |
| Skamania (Wash.) | 61 | 0 | |
| Skagit Valley (Wash.) | 11 | 0 | |
| Skagit River (Wash.) | 3 | 0 | |
| Skadat (Wash.) | 0 | 0 | |
| Sixth Avenue (Tacoma, Wash.) | 1 | 0 | |
| Sixteen (Mont.) | 0 | 0 |